Method for modeling switch reluctance motors with consideration on instantaneous iron loss

Abstract

The invention discloses a method for modeling switch reluctance motors with consideration on instantaneous iron loss, and belongs to the field of novel motor modeling. The method is applicable to theswitch reluctance motors with diversified phase numbers. The method includes building finite element models of motors by the aid of finite element analysis software, analyzing distribution of electromagnetic fields of the motors, acquiring dynamic magnetic density computational formulas for each region of each motor according to equivalent magnetic circuit processes and acquiring dynamic magneticdensity of each feature region; analyzing frequency-domain iron loss computational models of the motors to obtain instantaneous iron loss computational models; combining obtained dynamic magnetic density acquisition models and the instantaneous iron loss computational models with one another, computing integral iron loss of the motors, distributing the computed integral iron loss and adjusting themagnitude of parallel equivalent resistors at two ends of each phase winding according to the magnitude of distributed iron loss. The method for modeling the switch reluctance motors with the consideration on the instantaneous iron loss has the advantages that the switch reluctance motor modeling accuracy can be improved by the aid of the method, and the method has an important theoretical valueand a broad application prospect.

Description

technical field [0001] The invention relates to a modeling method of a switched reluctance motor considering instantaneous iron loss, and is especially suitable for modeling the instantaneous iron loss of each phase switched reluctance motor. Background technique [0002] Accurate simulation calculation of steady-state and dynamic performance is crucial to the design, analysis and control of switched reluctance motor drive systems. As an important part of the loss during the operation of the motor, iron loss affects the dynamic performance of the motor such as operating efficiency and temperature rise. At present, the commonly used simulation and analysis of the dynamic performance of the switched reluctance motor drive system is to use the finite element analysis to calculate the static characteristics of the motor without loss. According to the obtained static characteristics, the switch is established in the Simulink module of MATLAB software. A dynamic simulation model ...

AI Technical Summary

Problems solved by technology

However, as the motor speed increases or the power increases, the iron loss accounts for an increasing proportion of other losses in the motor, which has a greater impact on the dynamic performance of the switched reluctance motor.

For high-speed switched reluctance motors, the iron loss accounts for a relatively large proportion in the operation of the motor, and ignoring the iron loss will bring large errors to the study of the switched reluctance motor drive system

Images